wanderer/fastnetmon-rewritten
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Fix

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Pavel Odintsov 2013-10-21 17:43:00 +04:00
parent 5bfd139941
commit ebe406ccff
1 changed files with 139 additions and 79 deletions
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fastnetmon.cpp
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@ -71,8 +71,11 @@ int check_period = 3;
// Увеличиваем буфер, чтобы минимизировать потери пакетов
int pcap_buffer_size_mbytes = 10;
// Нас не интересуют запросы IP, у которых менее XXX pps в секунду
int threshold = 2000;
// По какому критерию мы сортируем клиентов? Допустимые варианты: packets/bytes
string sort_parameter = "packets";
// сколько всего выводим IP адресов в списках?
int max_ips_in_list = 7;
// Баним IP, если он превысил данный порог
int ban_threshold = 20000;
@ -84,6 +87,9 @@ int ban_details_records_count = 500;
/* Блок наших структур данных */
// поле, по которому мы сортируем данные
enum sort_type { PACKETS, BYTES };
enum direction {INCOMING, OUTGOING, INTERNAL, OTHER};
// структура для "легкого" хранения статистики соединений в памяти
struct simple_packet {
@ -95,13 +101,20 @@ struct simple_packet {
int length;
};
// data structure for storing data in Vector
typedef pair<uint32_t, int> pair_of_map_elements;
typedef pair<int, direction> banlist_item;
typedef pair<uint32_t, uint32_t> subnet;
// main data structure for storing traffic data for all our IPs
typedef map <uint32_t, int> map_for_counters;
typedef struct {
int in_bytes;
int out_bytes;
int in_packets;
int out_packets;
} map_element;
typedef map <uint32_t, map_element> map_for_counters;
// data structure for storing data in Vector
typedef pair<uint32_t, map_element> pair_of_map_elements;
/* конец объявления наших структур данных */
@ -120,11 +133,8 @@ int netlink_packets_counter = 0;
pcap_t* descr = NULL;
#endif
map_for_counters PacketsCounterIncoming;
map_for_counters PacketsCounterOutgoing;
map_for_counters TrafficCounterIncoming;
map_for_counters TrafficCounterOutgoing;
// счетчик трафика наш
map_for_counters DataCounter;
int total_count_of_incoming_packets = 0;
int total_count_of_outgoing_packets = 0;
@ -172,8 +182,20 @@ uint32_t convert_cidr_to_binary_netmask(int cidr);
bool belongs_to_networks(vector<subnet> networks_list, uint32_t ip);
// Function for sorting Vector of pairs
bool compare_function (pair_of_map_elements a, pair_of_map_elements b) {
return a.second > b.second;
bool compare_function_by_in_packets (pair_of_map_elements a, pair_of_map_elements b) {
return a.second.in_packets > b.second.in_packets;
}
bool compare_function_by_out_packets (pair_of_map_elements a, pair_of_map_elements b) {
return a.second.out_packets > b.second.out_packets;
}
bool compare_function_by_out_bytes (pair_of_map_elements a, pair_of_map_elements b) {
return a.second.out_bytes > b.second.out_bytes;
}
bool compare_function_by_in_bytes(pair_of_map_elements a, pair_of_map_elements b) {
return a.second.in_bytes > b.second.in_bytes;
}
string get_direction_name(direction direction_value) {
@ -298,31 +320,62 @@ void update_traffic_in_redis(uint32_t ip, int traffic_bytes, direction my_direct
}
#endif
void draw_table(map_for_counters& my_map_packets, map_for_counters& my_map_traffic, direction data_direction) {
void draw_table(map_for_counters& my_map_packets, direction data_direction, bool do_redis_update, sort_type sort_item) {
std::vector<pair_of_map_elements> vector_for_sort;
/* Вобщем-то весь код ниже зависит лишь от входных векторов и порядка сортировки данных */
for( map<uint32_t,int>::iterator ii=my_map_packets.begin(); ii!=my_map_packets.end(); ++ii) {
for( map_for_counters::iterator ii=my_map_packets.begin(); ii!=my_map_packets.end(); ++ii) {
// кладем все наши элементы в массив для последующей сортировки при отображении
pair_of_map_elements current_pair = make_pair((*ii).first, (*ii).second);
vector_for_sort.push_back(current_pair);
}
std::sort( vector_for_sort.begin(), vector_for_sort.end(), compare_function);
if (sort_item == PACKETS) {
// используем разные сортировочные функции
if (data_direction == INCOMING) {
std::sort( vector_for_sort.begin(), vector_for_sort.end(), compare_function_by_in_packets);
} else if (data_direction == OUTGOING) {
std::sort( vector_for_sort.begin(), vector_for_sort.end(), compare_function_by_out_packets);
} else {
// unexpected
}
} else if (sort_item = BYTES) {
if (data_direction == INCOMING) {
std::sort( vector_for_sort.begin(), vector_for_sort.end(), compare_function_by_in_bytes);
} else if (data_direction == OUTGOING) {
std::sort( vector_for_sort.begin(), vector_for_sort.end(), compare_function_by_out_bytes);
}
} else {
assert("Unexpected bahaviour");
}
int element_number = 0;
for( vector<pair_of_map_elements>::iterator ii=vector_for_sort.begin(); ii!=vector_for_sort.end(); ++ii) {
int pps = (*ii).second / check_period;
uint32_t client_ip = (*ii).first;
string client_ip_as_string = convert_ip_as_uint_to_string((*ii).first);
if (pps >= threshold) {
string pps_as_string;
std::stringstream out;
out << pps;
pps_as_string = out.str();
int in_pps = (*ii).second.in_packets / check_period;
int out_pps = (*ii).second.out_packets / check_period;
int in_bps = (*ii).second.in_bytes / check_period;
int out_bps = (*ii).second.out_bytes / check_period;
int pps = 0;
int bps = 0;
// делаем "полиморфную" полосу и ппс
if (data_direction == INCOMING) {
pps = in_pps;
bps = in_bps;
} else if (data_direction == OUTGOING) {
pps = out_pps;
bps = out_bps;
}
int mbps = int((double)bps / 1024 / 1024 * 8);
// еси клиента еще нету в бан листе
if (pps > ban_threshold) {
if (belongs_to_networks(whitelist_networks, client_ip)) {
// IP в белом списке
@ -331,6 +384,7 @@ void draw_table(map_for_counters& my_map_packets, map_for_counters& my_map_traff
cout<<"!!!ALARM!!! WE MUST BAN THIS IP!!! ";
// add IP to BAN list
// если клиента еще нету в бан листе
if (ban_list.count(client_ip) == 0) {
string data_direction_as_string = get_direction_name(data_direction);
@ -340,6 +394,7 @@ void draw_table(map_for_counters& my_map_packets, map_for_counters& my_map_traff
ban_list_details[client_ip] = vector<simple_packet>();
cout << "*BAN EXECUTED* ";
string pps_as_string = convert_int_to_string(pps);
exec("./notify_about_attack.sh " + client_ip_as_string + " " + data_direction_as_string + " " + pps_as_string);
} else {
// Есдли вдруг атака стала мощнее, то обновим ее предельную мощность в памяти (на почте так и остается старая цифра)
@ -354,15 +409,18 @@ void draw_table(map_for_counters& my_map_packets, map_for_counters& my_map_traff
}
}
// determine attack speed
int bps = my_map_traffic[ (*ii).first ] / check_period;
// convert to mbps
int mbps = bps / 1024 / 1024 * 8;
// Выводим первые max_ips_in_list элементов в списке, при нашей сортировке, будут выданы топ 10 самых грузящих клиентов
if (element_number < max_ips_in_list) {
cout << client_ip_as_string << "\t\t" << pps << " pps " << mbps << " mbps" << endl;
}
if (do_redis_update) {
//cout<<"Start updating traffic in redis"<<endl;
update_traffic_in_redis( (*ii).first, my_map_traffic[ (*ii).first ], data_direction);
update_traffic_in_redis( (*ii).first, (*ii).second.in_packets, INCOMING);
update_traffic_in_redis( (*ii).first, (*ii).second.out_packets, OUTGOING);
}
element_number++;
}
}
@ -539,24 +597,26 @@ void parse_packet(u_char *user, struct pcap_pkthdr *packethdr, const u_char *pac
total_count_of_outgoing_packets ++;
total_count_of_outgoing_bytes += packet_length;
// собираем данные для деталей при бане клиента
if (ban_list_details.count(src_ip) > 0 && ban_list_details[src_ip].size() < ban_details_records_count) {
ban_list_details[src_ip].push_back(current_packet);
}
PacketsCounterOutgoing[ src_ip ]++;
TrafficCounterOutgoing[ src_ip ] += packet_length;
DataCounter[ src_ip ].out_packets++;
DataCounter[ src_ip ].out_bytes += packet_length;
} else if (belongs_to_networks(our_networks, dst_ip)) {
packet_direction = INCOMING;
total_count_of_incoming_packets++;
total_count_of_incoming_bytes += packet_length;
// собираемы данные для деталей при бане клиента
if (ban_list_details.count(dst_ip) > 0 && ban_list_details[dst_ip].size() < ban_details_records_count) {
ban_list_details[dst_ip].push_back(current_packet);
}
PacketsCounterIncoming[ dst_ip ]++;
TrafficCounterIncoming[ dst_ip ] += packet_length;
DataCounter[ dst_ip ].in_packets ++;
DataCounter[ dst_ip ].in_bytes += packet_length;
} else {
packet_direction = OTHER;
total_count_of_other_packets ++;
@ -570,15 +630,22 @@ void parse_packet(u_char *user, struct pcap_pkthdr *packethdr, const u_char *pac
// clean up screen
system("clear");
cout<<"Below you can see all clients with more than "<<threshold<<" pps"<<endl<<endl;
sort_type sorter;
if (sort_parameter == "packets") {
sorter = PACKETS;
} else if (sort_parameter == "bytes") {
sorter = BYTES;
}
cout<<"FastNetMon v1.0 "<<"all IPs ordered by: "<<sort_parameter<<endl<<endl;
cout<<"Incoming Traffic"<<"\t"<<total_count_of_incoming_packets/check_period<<" pps "<<total_count_of_incoming_bytes/check_period/1024/1024*8<<" mbps"<<endl;
draw_table(PacketsCounterIncoming, TrafficCounterIncoming, INCOMING);
draw_table(DataCounter, INCOMING, true, sorter);
cout<<endl;
cout<<"Outgoing traffic"<<"\t"<<total_count_of_outgoing_packets/check_period<<" pps "<<total_count_of_outgoing_bytes/check_period/1024/1024*8<<" mbps"<<endl;
draw_table(PacketsCounterOutgoing, TrafficCounterOutgoing, OUTGOING);
draw_table(DataCounter, OUTGOING, false, sorter);
cout<<endl;
@ -610,10 +677,7 @@ void parse_packet(u_char *user, struct pcap_pkthdr *packethdr, const u_char *pac
for( map<uint32_t,banlist_item>::iterator ii=ban_list.begin(); ii!=ban_list.end(); ++ii) {
string client_ip_as_string = convert_ip_as_uint_to_string((*ii).first);
string pps_as_string;
std::stringstream out;
out << ((*ii).second).first;
pps_as_string = out.str();
string pps_as_string = convert_int_to_string(((*ii).second).first);
string attack_direction = get_direction_name(((*ii).second).second);
@ -637,13 +701,9 @@ void parse_packet(u_char *user, struct pcap_pkthdr *packethdr, const u_char *pac
// переустанавливаем время запуска
time(&start_time);
// зануляем счетчики пакетов
PacketsCounterIncoming.clear();
PacketsCounterOutgoing.clear();
TrafficCounterIncoming.clear();
TrafficCounterOutgoing.clear();
// зануляем счетчик пакетов
DataCounter.clear();
/* вот здесь можно сбросить данные в Redis */
total_count_of_incoming_bytes = 0;
total_count_of_outgoing_bytes = 0;